Beware, older languages below! The languages below were invented during Tolkien's earlier period and should be used with caution. Remember to never, ever mix words from different languages!

Qenya 

onilka

adjective. *the same amount

The correlatives ᴹQ. onilka or olka appeared in Demonstrative, Relative, and Correlative Stems (DRC) from 1948 (PE23/108), a combination of ᴹQ. on- “same” and ᴹQ. -lka “amount”.

Neo-Quenya: For purposes of Neo-Quenya I would update this to ᴺQ. imalca “the same amount” using im- “same”.